Function betabear::build_with_letters

pub fn build_with_letters(given_letters: &[char], word: &str) -> bool

Checks whether word can be written with the given letters.

let letters = ['a', 'p', 'p', 'l', 'e', 'x', 'y', 'z'];
let word = "apple";

assert!(betabear::build_with_letters(&letters, word));